m09-domain
Domain-driven design patterns for modeling entities, value objects, and aggregates in Rust.
- Distinguishes between Entities (unique identity required), Value Objects (interchangeable by value), and Aggregates (owned hierarchies), with clear Rust patterns for each
- Emphasizes invariant preservation through private fields, validated constructors, and type-state patterns
- Provides templates for common DDD structures: newtypes for value objects, structs with ID fields for entities, and module boundaries for aggregates
- Traces design decisions upward to domain constraints and downward to ownership and type-driven implementation patterns
Domain Modeling
Layer 2: Design Choices
Core Question
What is this concept's role in the domain?
Before modeling in code, understand:
- Is it an Entity (identity matters) or Value Object (interchangeable)?
- What invariants must be maintained?
- Where are the aggregate boundaries?
Domain Concept → Rust Pattern
| Domain Concept | Rust Pattern | Ownership Implication |
|---|
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